Growler systems: Secondary power system

Home > Preview

The flashcards below were created by user dcbailo on FreezingBlue Flashcards.


  1. What is included in the secondary power system
    • a. two airframe mounted accessory drives (AMAD)
    • b. a single auxiliary power unit (APU)
  2. During normal operation, each AMAD is mechanically driven by its corresponding engine through ...
    a powertransmission shaft
  3. AMAD drives...
    • a. fuel motive flow/boost pump
    • b. ac/dc electrical generator
    • c. a 3,000/5,000psi hydraulic pump.
  4. ... is used to rotate an air turbine starter (ATS) on each AMAD for engine crank/start capability.
    Pneumatic pressure
  5. The APU is a ... used to generate a source of air to power ... or to provide ...
    The APU is a small gas turbine engine used to generate a source of air to power the ATS for normal engine start or to provide an alternate air source for the environmental control system (ECS)
  6. The APU is located ...
    between the engines, with intake and exhaust facing downwards.
  7. The ... provides electrical power for APU ignition and start
    aircraft battery
  8. During normal operation, the APU shaft turns ...
    a separate compressor which supplies air for main engine start or alternate ECS operation.
  9. If an APU fire or overheat condition is detected on the ground, the APU fire extinguishing system ...
    automatically shuts the APU down and, after 10 seconds, discharges the extinguisher bottle.
  10. The APU switch returns to OFF ... after the second aircraft generator comes online
    1 minute
  11. To prevent an APU running engagement and to prevent APU exhaust torching, a minimum of ... must elapse between APU shutdown and another APU start.
    2 minutes
  12. The APU READY light, located on the left console adjacent to the APU switch, comes on when ...
    the APU has completed the start cycle and is capable of supporting engine crank.
  13. ... from one of three sources can be used to power the ATS for engine crank/start: ...
    Pneumatic pressure from one of three sources can be used to power the ATS for engine crank/start: APU compressor air, opposite engine bleed air (crossbleed), or external air.
  14. For a crossbleed start the operating engine should be set to a minimum of ... N2 rpm to make sure ...
    For a crossbleed start the operating engine should be set to a minimum of 80% N2 rpm to make sure bleed air output is sufficient to crank the opposite engine
  15. during extended crossbleed operation of a failed engine...
    ATS exhaust may blister paint and cause possible door damage on the aft underside of the fuselage
  16. ATS sources of overspeed cutout protection
    • 1. corresponding generator
    • 2. frequency sensing relay (FSR)
  17. When the generator comes online at ... N2 rpm, it removes power from the ATSCV and the FSR, which releases the ... switch
    When the generator comes online at 60% N2 rpm, it removes power from the ATSCV and the FSR, which releases the ENG CRANK switch
  18. Regardless of the engine start air source utilized, the corresponding ...switch should be ON, as the ...provides primary overspeed cutout protection for the ATS.
    Regardless of the engine start air source utilized, the corresponding GEN switch should be ON, as the generator provides primary overspeed cutout protection for the ATS.

Card Set Information

Author:
dcbailo
ID:
317897
Filename:
Growler systems: Secondary power system
Updated:
2016-03-25 04:03:26
Tags:
Growler
Folders:
Growler
Description:
Secondary power system
Show Answers:

Home > Flashcards > Print Preview